http://ipsur.org/ An introductory textbook to statistics and the R programming language.

http://blog.backblaze.com/2012/10/09/backblaze_drive_farming/ The story of how one company dealt with a worldwide hard drive shortage.

http://dyslexicfonts.com/ A font designed to help dyslexics read.

http://fd-imaging.com/the-worlds-tiniest-tiff-image/ This TIFF actually displays itself as a black and white bitmap.

http://abduzeedo.com/clever-google-maps-manipulations-christoph-niemann Clever art drawn in the style of Google Maps. I think this really shows off how well-made the Google Maps design language is.

http://www.flightradar24.com/ See flights in real-time from everywhere around the world.

http://peetm.com/blog/?p=55 The story of GO.COM, a commercially successful program with no instructions.

http://en.wikipedia.org/wiki/In_rem_jurisdiction In rem jurisdiction is the power a court has over property when the property itself is responsible.

http://www.pubcats.com/catmap Find the nearest pub with a cat!

http://thehighwatermarks.bandcamp.com/ Listen to The High Water Marks' latest album for free online. I'm surprised how quickly "Almost April" became one of my favorite songs.